dan&darci advanced rock tumbler kit - with digital 9-day polishing timer & 3 speed settings - turn rough rocks into beautiful gems : great science & stem gift for kids all ages : geology toy is up for auction in Toys & Games. The current bid is $3.00, 97% below the $99.99 MSRP, in New/Like New condition. Bid on this item at our Georgetown - Triport Road location before the auction closes.